Creating Columns in Element (Header)

Hi there,

Are you looking to add posts inside the header element?

If so using Tom's WP Show posts might be the easiest:
https://wordpress.org/support/plugin/wp-show-posts/

Let me know if this helps :)

Thanks Leo. But, I am trying to add some content to feature my YouTube channel and my course.

You should be able to do something like this inside the content:
https://generatepress.com/forums/topic/dividing-header-or-top-bar-into-segments/

Thanks Leo. How about column :)

Have you tried Tom's HTML and CSS?

It's basically creating 3 columns.